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Following up first doses of the Oxford-AstraZeneca or Pfizer-BioNTech vaccines with second doses of the Moderna or Novavax jabs will generate robust immune responses against COVID-19, according to researchers running the University of Oxford-led Com-COV study.

Two vials of different Covid-19 vaccines

In a paper published in the Lancet, they report that participants receiving a first dose of Oxford-AstraZeneca or Pfizer-BioNTech generated a robust immune response when immunised nine weeks later with a second dose of COVID-19 vaccines manufactured by Novavax or Moderna. No safety concerns were raised in this study of 1,070 participants, who took part in the study across nine National Institute for Health Research-supported sites.

This study therefore supports flexible use of these vaccines in primary immunisation schedules, which is crucial to help rapid deployment of these vaccines, especially in low- and middle-income countries where vaccine supply may be inconsistent.

Read the full story on the University of Oxford website

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